Download Craftsman 917.377621 Owner`s manual
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Owner's Manual CRAFTSMAN° 6.75 HORSEPOWER 21" REAR DISCHARGE POWER PROPELLED ROTARY LAWN MOWER Model No. 917.377621 • • • • • • Safety Assembly Operation Maintenance EspaSol Repair Parts CAUTION: Read and follow all Safety Rules and Instructions before operating this equipment Sears, Roebuck and Co., Hoffman Estates, IL 60179 Warranty Safety Rules Assembly Operation Maintenance Schedule Maintenance 2 2 4 6 10 10 Product Specifications Service and Adjustments Storage Troubleshooting Repair Parts Parts Ordering 11 14 14 16 34 Back Cover LIMITED TWO YEAR WARRANTY ON CRAFTSMAN POWER MOWER For two years from date of purchase, when this Craftsman Lawn Mower is maintained, lubricated, and tuned*up according to the operating and maintenance instructions in the owner's manual, Sears will repair free of charge any defect in material or workmanship. If this Craftsman Lawn Mower is used for commercial or rental purposes, this warranty applies for only 90 days from the date of purchase. This Warranty does not cover: • Expendable items which become worn during normal use, such as rotary mower blades, blade adapters, belts, air cleaners and spark plug. • Repairs necessary because of operator abuse or negligence, including bent crankshafts and the failure to maintain the equipment according to the instructions contained in the owner's manual. Warranty service is available by returning the Craftsman power mower to the nearest Sears Service Center/Department in the United States. This warranty applies only while this product is in use in the United States. This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state. SEARS, ROEBUCK AND CO., D/817 WA, HOFFMAN ESTATES, ILLINOIS 60179 TRAINING: • Read this operator's manual carefully. Become familiar with the controls and know how to operate your mower properly. Leam how to quickly stop mower. • Do not allow children to use your mower. Never allow adults to use mower without proper instructions. • Keep the area of operation clear of all persons, especially small children and pets. • Use mower only as the manufacturer intended and as described in this manual. • Do not operate mower if it has been dropped or damaged in any manner. Always have damage repaired before using your mower. • Do not use accessory attachments that are not recommended by the manufac- turar. Use of such attachments may be hazardous. • The blade turns when the engine is running. PREPARATION: • Always thoroughly check the area to be mowed and clear it of all stones, sticks, wires, bones, and other foreign objects. These objects will be thrown by the blade and can cause severe injury. • Always wear safety glasses or eye shields when starting and while using your mower. • Dress properly. Do not operate mower when barefoot or wearing open sandals. Wear only solid shoes with good traction when mowing. • Check fuel tank before starting engine. Do not fill gas tank indoors, when the engine is running or when the engine is hot.Allow the engine to cool for several minutes before filling the gas tank. Clean off any spilled gasoline before starting the engine. • Always make wheel height adjustments before starting your mower. Never attempt to do this while the engine is running. • Mow only in daylight or good artificial light. OPERATION: • Keep your eyes and mind on your mower and the area being cut. Do not let other interests distract you. • Do not mow wet or slippery grass. Never run while operating your mower. Always be sure of your footing -- keep a firm hold on the handles and walk. • Do not put hands or feet near or under rotating parts. Keep clear of the discharge opening at all times. • Always stop the engine whenever you leave or are not using your mower, 0r before crossing driveways, walks, roads, and any gravel--covered areas. • Never direct discharge of material toward bystanders nor allow anyone near the mower while you are operating it, • Before cleaning, inspecting, or repairing your mower, stop the engine and make absolutely sure the blade and all moving parts have stopped. Then disconnect the spark plug wire and keep it away from the spark plug to prevent accidental starting. • Do not continue to run your mower if you hit a foreign object. Follow the procedure outlined above, then repair any damage before restarting and operating you mower. • Do not change the governor settings or overspeed the engine. Engine damage or personal injury may resutt. • Do not operate your mower if it vibrates abnormally. Excessive vibration is an indication of damage; stop the engine, safely check for the cause of vibration and repair as required. • Do not run the engine indoors. Exhaust fumes are dangerous. • Never cut grass by pulling the mower towards you. Mow across the face of slopes, never up and, down or you might lose your footing. Do not mow excessively steep slopes. Use caution when operating the mower on uneven terrain or when changing directions -- maintain good footing. • Never operate your mower without proper guards, plates, grass catcher or other safety devices in place. MAINTENANCE AND STORAGE: • Check the blade and the engine mounting bolts often to be sure they are tightened properly. • Check all bolts, nuts and screws at frequent intervals for proper tightness to be sure mower is in safe working condition. • Keep all safety devices in place and working, • To reduce fire hazard, keep the engine free of grass, leaves or excessive grease and oil. • Check grass catcher often for deterioration and wear and replace worn bags. Use only replacement bags that are recommended by and comply with • specifications of the manufacturer of your '. mower. • Always keep a sharp blade on your mower. • Allow engine to cool before storing in any enclosure. • Never store mower with fuel in the tank inside a building where fumes may reach an open flame or an ignition source such as a hot Water heater, space heater, clothes dryer, etc. CAUTION: Always disconnect spark plug wire and place wire where it cannot contact spark plug in order to prevent accidental starting when setting up, transporting, adjusting or making repairs. WARNING The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm, 3 Theyarealso These accessories were available when this lawn mower was available at most Sears retail outlets and service centers. Most Sears stores can also order repair parts for you, when you provide the model number of your lawn mower. Some of these accessories may not apply to your lawn mower. LAWN MOWER PERFORMANCE CUPPING DEFLECTOR FOR REAR DISCHARGE STABlUZER MULCHER KITS LAWN MOWERS / FOR REAR DISCHARGE GRASS LAWN CATCHERS MOWERS FOR SIDE DISCHARGE GRASS LAWN CATCHERS MOWERS --_! GAS CANS LAWN MOWER MAINTENANCE AIR FILTERS MUFFLERS BELTS BLADES BLADE ADAPTERS Read these instructions and this manual in its entirety before you attempt to assemble or operate your new lawn mower. Your new lawn mower has been assembled at the factory with the exception of those parts left unassembled for shipping purposes. To ensure safe and proper operation of your lawn mower, all parts and hardware you assemble must be tightened securely. Use the correct tools as necessary to ensure proper tightness. All parts such as nuts, washers, bolts, etc., necessary to complete the assembly have been placed in the parts bag. TO REMOVE CARTON LAWN MOWER FROM • Remove loose parts included with mower. • Cut down two end corners of carton and lay end panel down flat. • Remove al_ packing materials except padding between upper and lower handle and padding holding operator SPARK PLUGS WHEELS ENGINE OIL presence control bar to upper handle. • Roll lawn mower out of carton and check carton thoroughly for additional loose parts. HOW TO SET MOWER TO UNFOLD UP YOUR LAWN HANDLE IMPORTANT: Unfold handle carefully so as not to pinch or damage control cables. • Raise lower handle section to operating position and squeeze the bottom ends of lower handle towards each other until the pin in handle can be inserted into one of the three height adjustment holes. • Remove protective padding, raise upper handle section into place on lower handle and tighten both handle knobs. • Remove any packing material from around control bar. • Your handles may be adjusted for your mowing comfort. Refer to Service and Adjustments section of this manual. Operator presence control bar Upper handle TO INSTALL Lift up Lift up Lower handle Mowing position Handle pin 3-position Handle adjustment bracket ATTACHMENTS Your lawn mower was shipped ready to be used as a mulcher. To convert to bagging or discharging: • Open rear door and remove mulcher plug. Store mulcher plug in a safe place. • You can now install catcher or optional clipping deflector, • To return to mulching operation, instal_ mulcher plug into discharge opening of mower. / Mulcher Plug KNOW YOUR LAWN MOWER READ THIS OWNER'S MANUALAND SAFETY RULES BEFORE OPERATING YOUR LAWN MOWER. Compare the illustrations with your lawn mower to familiarize yourself with the location of various controls and adjustments. Save this manual for future reference. These symbols may appear on your lawn mower or in literature supplied with the product. Leam and understand their meaning. CAUTION ENGINE OR WARNING ON ENGINE OFF FA_T SLOW CHOKE FUEL OIL DANGER, KEEP HANDS AND FEET AWAY Operator presence control Starter handle Cable clip Grass catcher Gasoline cap Wheel adjuster lever Primer Mulcher plug Engine oil cap w/dipstick Housing MEETS CPSC SAFETY REQUIREMENTS Sears rotary walk-behind power lawn mowers conform to the safety standards of the American National Standards Institute and the U.S. Consumer Product Safety Commission. The blade turns when the engine is running. Operator presence control - must held down to the handle to start the Drive control bar - used to engage power-propelled foward motion of lawn mower. Mulcher plug - Located at the rear discharge opening must be removed when converting to bagging operation. be engine. Release to stop the engine. Primer - pumps additional fuel from the carburetor to the cylinder for use when starting a cold engine. Starter handle - used for starting the engine. 6 The operation of any lawn mower can result in foreign objects thrown into the eyes, which can result insevereeye damage, Always wear safetyglassesoreye shields whileoperating your lawn mower or pedorming any adjustments or repairs. We recommend a wide vision safety mask over the spectacles or standard safety glasses. HOW TO USE YOUR LAWN MOWER ENGINE SPEED The engine speed was set at the factory for optimum performance. Speed is not adjustable. ENGINE ZONE CONTROL CAUTION: Federal regulations require an engine controlto be installed on this lawn mower in order to minimize the risk of blade contact injury. Do not under any circumstances attempt to defeat the function of the operator control. The blade turns when the engine is running. • Your lawn mower is equipped with an operator presence control bar which requires the operator to be positioned behind the lawn mower handle to start and operate the lawn mower. TO ADJUST cUTnNG HEIGHT • All four wheels are adjusted by a single lever. • Pull adjuster lever toward wheel. To raisa mower, move lever forward to desired position. To lower mower, move the lever toward the rear. Lower Wheels for hi h cut Wheel Adjuster Lever TO ATTACH GRASS CATCHER • Lift the rear door of the lawn mower and place the grass catcher frame hooks intothe slots of the rear door. • The grass catcher is secured to the lawn mower housing when the rear door is lowered onto the grass catcher frame. CAUTION: Do not run your lawn mower without clippingdeflector or approved graSS catcher in place. Never attempt to operate the lawn mower with the rear door removed or propped open. Rear door slots Grass handle Catcher frame hook TO EMPTY GRASS CATCHER • Liftup on grass catcher using the frame handle. • Remove graSScatcher with clippingsfrom underlawn mower handle. • Empty clippings from beg usingbothframe handleand beg handle. NOTE: DO notdragthebag when emptying; it will cause unnecessarywear. /. BEFORE STARTING ENGINE Raise Wheels for low cut TO OPERATE DRIVE SYSTEM • To startforward motion, liftdrive control bar up to handle. • To stop forward motion, release drive control bar. IMPORTANT: Always keep drive control bar fully engaged against handle when in use, Drive Operator presence control bar c°ntr°' To enga_ba: "_L_ _ drive control _n trol desengaged OIL Your lawn mower is shipped without oil in the engine. • Be sure mower is level and area around oil fill is clean. • Remove engine oil cap w/dipstick and fill to the full line on the dipstick. • Use 20 ozs. of oil. Fortypeandgradeofoil to use, see "ENGINE" in Maintenance section of this manual. • Pour oil slowly. DO not over fill • Check oil level before each use. Add oil if needed. Fill to full line on dipstick. • To read proper level, tighten engine oil cap each time. • Reinstall engine oil cap and tighten. • Changethe oil after every 25 hours of operation or each season. You may need to change the oil more often under dusty, dirty conditions. GAG • Fill fuel tank. Use fresh, clean, regular unleaded gasoline with a minimum of 87 octane. (Use of leaded gasoline will increase carbon and lead oxide deposits and reduce valve life). Do not mix oil with gasoline. Purchase fuel in quantities that can be used within 30 days to assure fuel freshness. IMPORTANT" WHEN OPERATING IN TEMPERATURES BELOW 32°F(0°C), use fresh, clean winter grade gasoline to help insure good cold weather starting. WARNING: Experience indicates that alcohol blended fuels (called gasohol or using ethanol or methanol) can attract moisture which leads to separation and formation of acids during storage. Acidic gas can damage the fuel system of an engine while in storage. To avoid engine problems, the fuel system should be emptied before storage of 30 days or longer. Drain the gas tank, start the engine and let it run until the fuel lines and carburetor are empty. Use fresh fuel next season. See Storage Instructions for additional information. Never use engine or carburetor cleaner products in the fuel tank or permanent damage may occur. CAUTION: Fill to bottom of gas tank filler neck. Do not overfill. Wipe off any spilled oil or fuel. Do not store, spill or use gasoline near an open flame. Engine oil cap w/dipstick TO START ENGINE • To start a cold engine, push primer five (5) times before trying to start. Use a fiJ'm push. This step is not usually necessary when starting an engine which has already run for a few minutes. • Hold operator presence control bar down to the handle and pull starter handle quickly. Do not allow starter rope to snap back. • To stop engine, release operator presence control bar. NOTE: In cooler weather it may be necessary to repeat priming steps. In warmer weather over priming may cause flooding and engine will not start. If you do flood engine, wait a few minutes before attempting to start and do not repeat priming steps. MOWING TIPS • Under certain conditions, such as very tall grass, it may be necessary to raise the height of cutto reduce pushing effort andto keep from overloading the engine and leaving clumps of grass clippings. • For extremely heavy cutting, reduce the width of cut by overlapping previously cut path and mow slowly. • When using a rear discharge lawn mower in moist, heavy grass, clumps of cut grass may not enter the grass catcher. Reduce ground speed (pushing speed) and/or run the lawn mower over the area a second time. • ff a trail of clippings is left on the rightside of a rear discharge mower, mow in a dockwise direction with a small overlap to collect the clippingson the next pass. Gasoline filler • Pores in cloth grass catchers can become filled with dirtand dust with use and catchers will ccllect less grass. To prevant this, regularly hose catcher off with water and let dry before using. • Keep top of engine around starter clear and clean of grass clippings and chaff. This will help engine air flow and extend engine life. • For best results, adjust the lawn mower cutting height so that the lawn mower cuts off only the top one-third of the grass blades. If the lawn is overgrown itwill be necessary to raise the height of cut to reduce pushing effort and to keep from overloadingthe engine and leaving clumps of mulched grass. For extremely heavy mulching, reduce your width of cut by overlapping previously cut path and mow slowly. • Certain types of grass and grass conditions may require that an area be mulched a second time to completely hide the clippings. When doing a second cut, mow across or perpendicular to the first cut path. • Change your cutting pattern from week to week. Mow north to south one week then change to east to west the next week. This will help prevent matting and graining of the lawn. MULCHING MOWING TIPS IMPORTANT: For best performance, keep mower housing free of built-up grass and trash. See "Cleaning" in Maintenance section of this manual. • The special mulching blade will recut the grass clippings many times and reduce them in size so that as they fall onto the lawn they will disperse into the grass and not be noticed. Also, the mulched grass will biodegrade quickly to provide nutrients for the lawn. Always mulch with your highest engine (blade) speed as this will provide the best recutting action of the blades. • Avoid cutting your lawn when it is wet. Wet grass tends to form clumps and interferes with the mulching action. The.best time to mow your lawn is the early affemoon. At this time the grass has dried and the newly cut area will not be exposed to the direct sun. 3 9 .A,NTENANCE SCHEDULE FILL IN DATES _ _ _ ,_._..,I, _ SERVICE DATES ICE O REGULAR SERVICE Check forLoose Fasteners I/ li/ Clean/Inspast Grass Catcher iM Clean Lawn Mower :O, Clean (Power-PropelledMowers) Under Drive Cover (Power-Propelled t/ Mowers) RE Check drive beWpulleys CheclVSharpen/Replace Blade LubricationChart _b/s Clean Battery/Recharge IElectric Start Mowers! E Check Engine Oil Level N Change Engine Oil I_ t/1.2 Inspect Muffler _N Clean Air Filter Clean or Replace Spark Plug I_ E !Replace Air Filter Paper Cartridge 12 3 4 - I/4 I/ 1_2 Change more often when opera,rig un_r a MaW load or _ high anlblent tempwatures. Service morn olten when operating _ dirty or dusty condlUom. Replace blades more often when mowing in sandy soil. Charge 48 hours at end of season. GENERAL LUBRICATION RECOMMENDATIONS CHART (_ Wheel The warranty on this lawn mower does not cover items that have been subjected to operator abuse or negJkjence, To receive full value from the warranty, operator must maintain mower as instructed in this manual. Some adjustments will need to be made pedodicaity to property maintain your unit. All adjustments in the Service and Adjustmerits section of this manual should be checked at least once each season. • Once a year, replace the spark plug, replace air filterelement and check blade for wear. A new spark plug and clean/new air ititerelement assures proper alr-fual mixture and helps your engine run better and last longer. • Follow the maintenance schedule in this manual. BEFORE EACH USE • Check engine oil level. • Check for loose fasteners. LUBRICATION Keep unit well lubricated (See "LUBRICATION CHART"). adjuster "_'_ I (_ Drive pins _'_ t_ b acket ingin_Polng Brake (_) Rear door hinge (_) Spray lubricant (_) Refer to Maintenance "ENGINE" section. IMPORTANT: Do not oil or grease plastic wheel bearings. VLsoouslubricantswill attract dust and dirtthat will shorten the life of the self lubricatingbearings, If you feel they must be lubricated, use only a dry,powdered graphite type lubricant sparingly. 10 PRODUCT SPECIFICATIONS MODEL NUMBER SERIAL 917.377621 NUMBER DATE OF PURCHASE HORSEPOWER: 6.75 DISPLACEMENT: 12.56 CU. IN. GASOLINE 1.25 QUARTS CAPACITY/TYPE: UNLEADED OIL TYPE (API-SF/SG/SH): REGULAR SAE 30 (ABOVE 32°F) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: SPARK PLUG(GAP: 20 OZS. .030") CHAMPION VALVE CLEARANCE: RN4C INTAKE: .004 - .008 EXHAUST: .004 - .008 SOLID STATE IGNITION AIR GAP: .0125 IN. BLADE BOLT TORQUE: 35-40 FT. LBS. The model and serial numbers will be found on a decal attached to the rear of the lawn mower housing.Record both serial number and date of purchase in space provided above. LAWN MOWER Always observe safety rules when performing any maintenance. TIRES • Keep tires free of gasoline, oil, or insect controlchemicals which can harm rubber. • Avoid stumps, stones, cleep ruts,sharp objects and other hazards that may cause tire damage. BLADE CARE For best results, mower blade must be kept sharp. Replace bent or damaged blades. TO REMOVE BLADE • Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with spark plug. • Turn lawn mower on its side. Make sure air filterand carburetor are up. • Use a wood block between blade and mower housing to prevent blade from turning when removing blade belt. • Protect your hands with gloves and/or wrap blade with heavy cloth. • Remove blade bolt by turning counterclockwise. • Remove blade and attaching hardware (bolt, lock washer and hardened washer). NOTE: Remove the blade adapter and check the key inside hub of blade adapter. The key must be in good conditionto work properly. Replace adapter ifdamaged. TO REPLACE BLADE • Positionthe blade adapter on the engine crankshaft. Be sure key in adapter and crankshaft keyway are aligned. • Position blade on the blade adapter aligning the two (2) holes in the blade with the raised lugs on the adapter. • Be sure the trailingedge of blade (opposite sharp edge) is up toward the engine. • install the blade boltwith the lock washer and hardened washer into blade adapter and crankshaft. • Use block of wood between blade and lawn mower housing and tighten the blade bolt, turning clockwise. • The recommended tightening torque is 3540 ft. Ibs. IMPORTANT: Blade bolt is grade 8 heat treated. 11 NOTE: We do not recommend sharpening blade - but if you do, be sure the blade is balanced. TO SHARPEN BLADE Care should be taken to keep the blade balanced. An unbalanced blade will cause eventual damage to lawn mower or engine. • The blade can be sharpened with a file or on a grinding wheel. Do not attempt to sharpen wh_e on the mower. • To check blade balance, drive a nail into a beam er wall. Leave about one inchof the straight nail exposed. Place center hole of blade over the head of the nail. If blade is balanced, it should remain in a horizontal position. If either end of the blade moves downward, sharpen the heavy end until the blade is balanced. Blade Crankadaptor shaft keyway • The pinion gear must be installed with the left gear on the left side and with the right gear on the right side, from an operator's view. • The pinion gear is stamped with an "L" (left) or "R" (right) on the inside. If installed incorrectly, the drive system will not work. • Place wheels back on adjuster axles. • Replace Iocknuts and hubcaps. NOTE: Pinions and drive pawls should be cleaned and lubricated with grease approximately every 25 hours or once a year. Locknut Drive pin Pinion E-ring Blade ENGINE LUBRICATION Blade bolt \ Lock washer Hardened washer Trailing edge Crankshaft Use only high quality detergent oil rated with API service classificationSF, SG or SH. Select the oil's SAE viscositygrade according to your expected operating temperature. SAE VISCOSITY GRADES adaptor GRASS CATCHER • The grass catcher may be hosed with water, but must be dry when used. • Check your grass catcher often for damage or deterioration. Through normal use it will wear. If catcher needs replacing, replace only with a manufacturer approved replacement catcher. Give the lawn mower model number when ordering. DRIVE WHEELS Check rear drive wheels each time you mow to be sure they move freely. The wheels not turning freely means trash, grass cuttings, etc., may be inside the drive wheel and dust cover area and must be cleaned out to free ddve wheels. If necessary to clean the drive wheels, check both rear wheels. • Remove hubcaps and Iocknuts. • Remove wheels from wheel adjuster axles. tO" 3o* "flEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE NOTE: Although muifi-viscosity oils (5W30, 10W30 etc.) improve starting in cold weather, these multi-viscosity oils will resultin increased oil consumption when used above 32°F. Check your engine oil level more frequently to avoid possible engine damage from running low on oil. Change the oil after every 25 hours of operation or at least once a year if the lawn mower is not used for25 hours in one year. Check the crankcase oil level before starting the engine and after each five (5) hours of continuoususe. TK:Jhtenoil plug securely each time you check the oil level. • Remove any trash or grass cuttings from inside the dust cover, pinion and/or drive wheel gear teeth. 12 TO CHANGE ENGINE OIL NOTE: Before tipping lawn mower to drain oil, drain fuel tank by running engine until fuel tank is empty. • Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with spark plug. • Remove engine oil cap; lay aside on a clean surface. • Tip lawn mower on its side as shown and drain oil into a suitable container. Rock lawn mower back and forth to remove any oil trapped inside of engine. • Wipe off any spilled oil on lawn mower and on side of engine. • Flit engine with oil. Fill only to the"FULL" line on the dipstick. DO NOT OVER FILL • Replace engine oil cap. • Reconnect spark plug wire to spark plug. Container AIR FILTER Your engine will not run properly and may be damaged by using a dirty air filter. Replace the air filler every year, more often if you mow in very dusty, dirty conditions. Do not wash air filter. MUFFLER Inspect and replace corroded muffler as it could create afire hazard and/or damage. SPARK PLUG Change your spark plug each year to make your engine start easier and run better. Set spark plug gap at .030 inch. CLEANING IMPORTAN'E For best performance, keep mower housing free of built-up grass and trash. Clean underside of mower housing after each use. CAUTION: Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with the spark plug. •Tum lawn mower on itsside. Make sure air filterand carburetor are up. Clean the underside of your lawn mower by scraping to remove build-up of grass and trash. • Clean engine often to keep trash from accumulating, A clogged engine runs hotter and shortens engine life. • Keep finished surfaces and wheels free of all gasoline, oil, etc. • We do not recommend using a garden hose to clean lawn mower unless the electrical system,muffler, air filter and caflouretor are covered to keep water out. Water in engine can result in shortened engine life. TO CHANGE AIR FILTER • Remove the air filter by turning clockwise to the stop and pull away from collar. • Remove filter from inside of cover. • Clean the inside of the cover and the collar to remove any dirt accumulation. • Insert new filter into cover. • Put air filter cover and filter into collar aligning the tab with the slot. • Push in on cover and turn counterclockwise to tighten. Tum Clockwise to Remove Clip Tum Slot Clockwise to Air Filter Tab r Fitter Cover "lighten 13 CAUTION:BEFORE PERFORMINGANY SERVICE OR ADJUSTMENTS: • Release control bar. • Make sure the blade and all moving parts have completely stopped. • Disconnect spark plug wire from spark plug and place where it cannot come in contact with plug. LAWN Med.Low J 3-position Handle adjustment bracket MOWER TO ADJUST cLrn'ING HEIGHT See "TO ADJUST CUI-rING HEIGHT' in the Operation section of this manual. REAR DEFLECTOR The rear deflector, attached between the rear wheels of your lawn mower, is provided to minimize the possibilitythat objectswill be thrown out the rear of the lawn mower into the operator's mowingposition. If the rear deflector becomes damaged, it should be replaced. TO ADJUST HANDLE The handle on your lawn mower has three (3) height positions - adjust to height that suits you. • Squeeze the bottom ends of lower handle towards each other until the pin in handle can be inserted into one of the three height adjustment holes. Immediately prepare your lawn mower for storage at the end of the season or if the unit will not be used for 30 days or more. LAWN Handle pin MOWER When lawn mower is to be stored for a period of time, clean it thoroughly, remove all dirt, grease, leaves, etc. Store in a dean, dry area. • Clean entire lawn mower(See "CLEANING" in the Maintenance section of this manual). • Lubricate as shown in the Maintenance section of this manual. • Be sure that all nuts, bolts, screws, and pins are securely fastened. Inspect moving parts for damage, breakage and wear. Replace it necessary. • Touch up all rusted or chipped paint surfaces; sand lightlybefore painting. ENGINE ENGINE SPEED Your engine speed has been factory set. Do not attempt to increase engine speed or it may resultin personal injury. If you believe that the engine is running ton fast or too slow, take your lawn mower to an authorized service center/department for repair and adjustment CARBURETOR Your carburetor has a non-adjustable fixed main jet for mixture control. If your engine does not operate pmpedy due to suspected carburetor problems, take your lawn mower to an authorized service center/department for repair and adjustment. HANDLE • You can fold your lawn mower handle for storage. • Loosen the two (2) handle Imobs on sides of the upper handle and allow handle to fold down to the rear. • Squeeze the bottom ends of lower handle toward each other until pins in handle clear the brackets and pivot entire handle assembly forward and allow it to rest on mower. • When setting up your handle from the storage position, the lower handle will require manually locking into the mowing position. IMPORTANT: When folding the handle for storage or transportation be sure to fold the handle as shown or you may damage the control cables. 14 Operator presence controlbar Upper handle ENGINE OIL Lift up Liftup Lower handle Mowing position Drain oil (with engine warm) and replace with clean engine oil. (See "ENGINE" in the Maintenance section of this manual). CYMNDER • Remove spark plug. • Pour one ounce (29 ml) of oilthrough spark plug hole intocylinder. • Pull starter handle slowly a few times to distributeoil. • Replace with new spark plug. OTHER • Do not store gasoline from one season to another. ENGINE FUEL SYSTEM IMPORTANT: it is importantto prevent gum deposits from forming in essential fuel system parts such as carburetor, fuel filter,fuel hose, or tank during storage. Also, experience indicates that alcohol blended fuels (called gasohol or using ethanol or methanol) can attract moisture which leads to separation and formation of acids during storage. Acidic gas can damage the fuel system of an engine while in storage. • Drain the fuel tank. • Start the engine and let it run untilthe fuel lines and carburetor are empty. • Never use engine or carburetor cleaner products in the fuel tank or permanent damage may occur. • Use fresh fuel next season. • Replace your gasoline can if your can starts to rust. Rust and/or dirt in your gasoline will cause problems. • If possible, store your unit indoors and cover it to give protection from dust and dirt. • Cover your unitwith a suitable protective cover that does not retain moisture. Do not use plastic. Plastic cannot breathe which allows condensation to form and will cause your unit to rust. IMPORTANT: Never cover mower while engine and exhaust areas are stillwarm. CAUTION: Never store the lawn mower with gasoline in the tank inside a building where fumes may reach an open flame or spark. Allow the engine to cool before storing in any enclosure. NOTE: Fuel stabilizer is an acceptable alternative in minimizing the formation of fuel gum deposits during storage. Add stabilizer to gasoline in fuel tank or storage container. Always follow the mix ratio found on stabilizer container. Run engine at least 10 minutes after adding stabilizer to allow the stabilizer to reach the carburetor. Do not drain the gas tank and carburetor if using fuel stabilizer. 15 TROUBLESHOOTING PROBLEM Doesnot start CHART CAUSE CORRECTION • Clean/replace air filter • Fill fuel tank. * • Drain tank and refillwith fresh dean fuel. • Drain fuel tank and carburetor and refilltank • Dirtyairfilter. • Out offuel. • Stalefuel. • Water in fuel. with fresh ga_ine. • Connect wire to plug. • Spa_plug_re_ disconnected. • Badspa_p_g. • Loose blade or broken blade adapter. • Control bar in released posen • Control bar defective Loss of power • Rear oflawnmowerhousing orcuttingbladedragging in heavygrass. • Cuttingtoo muchgrass. • Dirty air filter. • Buildup of grass, leaves, and trash under mower. • Too much oil in engine. • Waildng speed too fast. • Replacespa_ plug. • T,3htenbladeboltor replacebladeadapter. • Depresscontrolbarto handle. • Replacecontrolbar. • Setto "HigherCut" pos_on. • Set to "Higher Cut" position. • Clean/replace air filter. • Clean underside of mower housing. • Check oil level. • Cut at slower waiking speed 16 TROUBLESHOOTING PROBLEM Poor cut- CHART CAUSE uneven •Wom, CORRECTION bent or loose blade. • Wheel heights uneven. Exce6sive vibration • Buildupof grass, leaves and trash under mower • Cleanundersideof mowerhousing. •Wom, • Replaceblade.T_hten bladebolt. • Contactan authorized servicecenter. bent or loose blade. • Bent engine crankshaft. Starter rope hard to pull • Replaceblade.Tighten bladebolt. • Set allwheelsat same hekjht • Engine flywheel brake is on when control bar is released. • Depress control barto upper handle before • Bent engine crankshaft. pullingstarter rope. • Contact an authorized service center. • Blade adapter broken. • Blade dragging in grass. • Replace blade adapter. • Move lawn rnower to cut grass orto hard surface to start engine. Grass catcher not filling (if so equipped) Hardtopush • Cutting height too low. • Lift on blade worn off. • Raise cut_ height. • Catcher not venting air. • Replace blade. • Clean grass catcher. • Grass is too high or wheel • Ra_ cutUng he_ he_t_too_w • Rear of lawn mower • Raise rear of lawn mower housing or blade dragging ingress. • Grass catcher too full. • F_n_gress catc_r • Hand_ he_ pos_on not r_foryou. • Adjust handle he'_ht to suit. 17 housing one (1) setting h_r, ROTARY KEY NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 PART NO. 164286 161105X479 131036 153638 63601 66426 131959 87692 164265 161551 73990500 51793 161586 850733X004 83816 162085 161548 165261 162098 161568X479 161569X479 150078 LAWN MOWER - - MODEL NO. 917.377621 DESCRIP_ON Handle, Upper DIxComf. Handle, Lower Bail, ConL Wire DIxComf. BIk Guide, Rope, Side Nut, Hex Lockwasher 1/4-20 Wire, "Tie Bolt, Handle 5/16-18x 1.75 Knob, Handle Gdp, Hdl Foam Smooth Bolt, Sq. Neck Nut. Hex Lockw_her Ins. 5/16-18 UNC Cotter, Hairpin Cable Bracket, Upstop Screw, Hax Washer Head Tapping 10-2 Kit, Door Rear Seal, Door Plug, Mulcher Kit, Housing Handle, Bracket Handle, BracketAsm. Right Screw, FlexWshd KEY NO. 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 .. -- PART NO. 163183 63124 161333 163409 161550 88652 134612 851514 159267 851074 850263 851084 85543 87677 150406 ....... 161768 161358 85463 161058 165516 DESCRIPTION Bolt, Hex Head 5/16-18 x 5/8 Nut, Hex LockWshr 5/16-18 Baffle, Side Screw 12 x 5/8 Skirt Screw, Hinge 1/4-20 x 1.25 Shield, Debds Modified Adapter,Blade w/key Longer Blade, 21" Washer, Hardened Lockwasher,Helical Spring3/8 Screw, Hex Head 3/8-24 x 1.38 Pulley, Engine Key, HI Pro Bolt, Engine Engine (See Breakdown)143.986716 Gross Catcher Sag Grass Catcher Frame Danger Decal Waming Decal (Not Shown) Owner'sManual Available accessoriesnot includedwith lawn mower: 7133623 Gas Can (2.6 gal.) 7133500 Fuel Stabilizer 7133000 SAE 30W Oil (20 oz.) 7133086 Chute Deflector ROTARY LAWN MOWER - - MODEL NO. 917.377621 17 ROTARY LAWN MOWER - - MODEL NO. 917.377621 KEY NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2O 21 22 PART NO. 161587 161473 161478X004 83816 161537 75O634 160816 132010 163939 160813X004 17541011 75192 161581 145354 57079 161584X479 161602 160477X004 161546 12000022 163365 88O6O DESCRIPTION Cable Drive Bail ControlDrive Bracket, Downstop Screw Hex Wash Heed Tapping 10-2 Cover Drive Screw Tl_lro_10-25 x .50 V-Belt Nut Lock Flanged 3/8-16 Zinc Pulley Driven Belt Keeper Screw Hex Wash Head 10-24 X.668 Spdng TmnemlsslanA_n. PinSpringThrust Washer Hardened Rod Connecting ,s_ng Extension SpringSelector KnobSelectorSpdng E-Ring718 BearingSupport BearingBall KEY NO. PART NO. 23 24 161118X004 57808 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 164795 165096 165097 12000058 88080 67725 88446 150342 145212 150181 160785 X004 160786X004 161463 1634O9 700279 150339 150182 83923 19572216 DESCRIPTION Retainer Ddve Asm. Stmp. . Screw Hex Head Tapping 1/4-20 x .75 Drive Pawl Pinion,Drive RH Pinion,Drive LH E-Ring 7/16 Cover, Dust Wheel Washer 1/2 x 1-1/2 x .134 Bushing Wheel 9x2 Nut Hex Flange Lock Hubcap,Mag Platinum9" ShaftAsm. Rear ShaftAsm. Front Retainer FrontShaft Screw 12 x 5/8 Cllp Retainer Wheel 8x2 Hubcap,Mag Platinum8" Nut, Hex Flange Lock 3/8-16 Washer CRAFTSMAN _-CYCLE ENGINE MODEL NUMBER 143.986716 161 38 CRAFTSMAN KEY NO. PART NO, 1 2 6 7 12 12A 36835A 26727 33734 36557 32447 36558 12B 14 15 16 17 18 19 20 30 40 4O 36694 28277 30589 34830A 31335 651018 36281 32600 37022 35544A 35545A 4O 35546 41 41 35541 35542 41 35543 42 42 42 43 45 46 48 50 52 69 70 35547A 35548A 35549 20381 32875A 32610A 35616 37285 29914 35261 3431t E 72 73 75 80 81 82 83 86 89 90 92 93 100 101 103 30572 28833 27897 30574A 30590A 30591 30588A 650488 611004 611112 650815 650816 34443B 610118 651007 110 119 120 125 125 37047 36738 36721 36471 36472 126 29314C 126 29315C 130 650912 130A 650999 135 34645 4-CYCLE ENGINE DESCRIPTION Cylinder (Incl. 2 & 20) Dowel Pin Braather Element Breather Ass'y. (Incl.6 & 12A) Breather Tube BreatherCover & Tube (IncL 12B) BreatherTube Elbow Washer GovemorRod(IncL 14) Govemor Lever GovernorLever Clamp Screw, Torx T-15, 8-32 x 19/64" ExtensionSpring Oil Seal Crankshaft Piston, Pin & Ring Set (Std.) Piston, Pin & Ring Set (.010" OS) Piston,Pin & Ring Set (.020" OS) Piston& Pin Ass'y.(Std.) Piston& Pin Ass_. (,010" OS) (Incl. 43) Piston& Pin Ass_/.(.020" OS) (Incl. 43) Ring Set (Std.) Ring Set (.010" OS) Ring Set (.020" OS) PistonPin RetainingRing ConnectingRed Ass'y.(Incl. 46) ConnectingRod Bolt Valve Lifter Camshaft (MCR) Oil PumpAss'y. • Mounting Flange Gasket Mounting Flange (incl. 72 thru 83,3O6) Oil Drain Plug(Incl. 73) DrainPlug Gasket Oil Seal Govemor Shaft Washer Governor Geer Ass'y. (Incl. 81) Govemor Spool Screw, 1/4-20 x 1-1/4" FlywheelKey Flywhee{ BeflevilleWasher FtywheelNut SolidState Ignition Spark PlugCover Screw, Torx T-15, 10-24 x 15/ 16" GroundWire • Cylinder Head Gasket Cylinder Head Exheust Valve (Std.) (Ind. 151) Exhaust Valve (1/32" OS) (Ind. 151) Intake Valve (Std.) (Incl. 16t) Intake Valve (t/32" OS) (Incl. 151) Screw, 5/16-18 x 1-1/2" Screw, 5/16-18 x 2-41/64" ResistorSpark Plug(RN4C) MODEL NUMBER 143.986716 KEY NO. PART NO. 150 151 153 154 155 157 158 159 160 161 178 182 184 185 186 187 189 191 195 207 216 223 223A 224 238 239 241 245 250 260 261 262 263A 275 276 277 285 287 290 292 298 300 301 305 306 307 309 310 313 341A 347 370A 370C 380 390 400 31672 31673 36649 650913 35624A 650914 36629 35626 35718 30063 29752 30088A 26756 36579 32653 36580 650839 36559A 610973 34336 33086 651044 651043 36581 650932 34338 36919 36905 36920 37180 30063 650831 37184 36950A 36949 651039 35000A 650926 29774 26460 28763 36916 36246 35647 36996 35499 650562 35648 34080 36578 651038 36261 37199 640195 590739 36806B DESCRIPTION • • * * Valve Sp_ng Valve SpringCap Push Red Guide RockerArm Stud RockerArm Lock Nut Push Red Rocker Arm Cover Gasket Rocker Arm Housing Screw, TorxT-30, 1/4-20 x 1/2" Nut & LockWasher, 1/4-28 Screw, 1/4-28 x 1" CarburatorGasket Intake Pipe GovernorLink Spacer Screw, 1/4-20 x 3/8" S.E. Brake Ass'y.(Incl. 195) Terminal ThrottleUnk R.P.M. AdjustingLever Screw, 114-20x 2-25/32" Screw, 1/4-20 x 1-31/64" Intake Pipe Gasket Screw, 10-32 x 49/64" Air Cleaner Gasket Air Cleaner Collar Air Cleaner Filter Air Cleaner Cover Blower Housing Screw, Torx %30, 1/4-20 x 1/2" Screw, 1/4-20 x 1/2" Starter Grill Muffler (Ind. 276 & 277) LockingPlate Screw, 1/4-20 x 2-47/64" Starter Cup Screw, 6-32 x 21/64" Fuel Line Fuel LineClamp Screw, 10-32 x 35/64" Fuel Tank (Ind. 292 & 301) Fuel Cap Oil FiNTube • "O'-Rlng "O'-R_g Screw, 10-32 x 1/2" Dipstick Spacer Blower HousingSupportBracket Screw, 10-32 x 27/32" LubricationDecal Primer Decal Carburetor(Incl. 184) RewindStarter Gasket Set (Incl. Items Marked ") 900 ----900 ---- -- Replacement Engine NONE Replacement S/B 750834, order from 71-999 RPM High 3000 to 3300 NOTE: This engine couldhave been builtwith 590702 starter). NOTE: All componentdimensionsgiven in U,S. inches 1 inch = 25.4 mm 39 CRAFTSMAN 4-CYCLE ENGINE MODEL NUMBER 143.986716 J;p--w KEY NO. PART NO. ---- 640195 631615 631767 631184 631183 640070 65O5O6 631807 651025 630766 640027 64O2OO 631867 631024 632019 631028 631021 631022 36045A 640080 632766 632547 632746 27110A 630748 631027 6310_7 632760 1 2 4 5 6 7 16 17 18 20 20A 25 27 28 29 30 31 35 36. 36A 37 40 44 47 48 48A 60 DESCRIPTION Carbureto_(Ind. 184 of Engine Parts List) ThroWeShaft & Lever Assembly ThrottleReturn Spring " Dust Seal Washer • Du._ Se_ t'n_ot_e) Throtb Shutter * ShutWrScrew Fuel Fitting Crock Screw/Idle Speed Screw Tension Spring Idle RestdclorScrew Idle RestdctorScrew Cap Float Bowl * Float Shaft Float * ROWBowl "Cff Ring • Inlet Needle, Seat, & C,p (incl. 31) Slx_gC,p PrimerBulb/RetainerRing MainNozzle Tube CarburetorTube ""O" Ring, Main Nozzle Tube High Speed Bowl Nut Bowl NutWasher * Welch Plug, Idle Mixture Well • Welch Plug, AtmosphericVent * Welch Plug Repair kit(Incl. Items Marked *) 4O CRAFTSMAN 4..CYCLE ENGINE MODEL NUMBER 143.986716 KEY NO. PART NO. DD 1 2 3 4 5 6 7 8 590702 590599A 59O6OO 59O696 59O601 590697 590698 590699 590700 11 590703 12 590535 13 590701 Starter Handle PART NO. DESCRIPTION DESCRIPTION Recoil Starter SpringPin (Incl.4) Washer Retainer Washer Brake Spdng Starter Dog oog sp_ng Pulley & Rewind Spdng Ass'y. Starter HousingAss'y. (40 degree grommet) Starter Rope ( 98" X 9/ 64"die.) mS 0--2 KEY NO. 3 6 7 8 41 590739 59O74O 590616 590617 ,590618A 11 59O638 12 59O535 13 14 590701 590760 Rewind Starter Retainer StarterDog Dog Spdng Pulley& Rewind Spring Ass'y Starter HousingAss'y (40 degree grommet) Starter Rope (Length 98" x 9/64" dia.) Starter Handle Spring Clip 42 Forthe repairor replacementpartsyouneed delivereddirectlyto yourhome Call7 am- 7 pm,7 daysa week 1-800-366-PART (1-800-366-7278) Para ordenar piezas con entrega a domicilio - 1-800-659-7084 For in-house major brand repair service Call 24 hours a day, 7 days a week 1-800-4-REPAIR (1-800-473-7274) Para pedir servicio de reparacidn domicilio - 1-800-676-5811 a For the location of a Sears Parts and Repair Center in your area Call 24 hours a day, 7 days a week 1-800-488-1222 For information on purchasing a Sears Maintenance Agreement or to inquire about an existing Agreement Call 9 am - 5 pm, Monday-Saturday 1-800-827-6655 When requesting service or ordering parts, always provide the following information: • Product Type • Part Number • Model Number • Part Description SEARS Amencas Flepatr Speciatlsts 165516 REV.1 01.28.99 VB Printed in U.S.A.